Barracuda CudaTel Communication Server contains a flaw that allows a reflected cross-site scripting (XSS) attack. This flaw exists because the application does not validate the 'ueues_wall_stub' and 'ops opOpenQueueWallboard' parameters upon submission to the /ajax-html/queues_wall_stub.html script. This may allow an attacker to create a specially crafted request that would execute arbitrary script code in a user's browser within the trust relationship between their browser and the server.